Most web hosting companies provide you with email hosting as well; however, the email hosting service provided by web hosting companies for the most part only supplies you with POP3 email and the basics in spam/virus protection and other features.
Additionally, some of the free email hosting providers are ad-supported. Again, if you own a small or medium sized business (SME), then you should not want to operate your business email using one of these providers since the email service is typically sub-par as compared to a professional email hosting service.
Using a professional email hosting service should give you peace of mind. You should be able to focus on your business while the email hosting provider manages your email service.
Most email hosting providers offer a rich set of webmail features including unlimited aliases, unlimited forwarders, autoresponders, large attachments, robust spam/virus protection, mail rules, IMAP/POP3, online storage, calendars, mailing lists, whitelists, blacklists, backups, archiving, folder management, contacts management, etc.
You would also be able to access your email from anywhere using webmail, smartphone and your favorite email client such as Outlook.
Best of all, professional email hosting service is very affordable. It eliminates the need for in-house email servers and IT people to manage those email servers.
Compare email hosting providers by taking advantage of the free trials that most email hosting companies tend to provide and then choose the one that works best for your needs.